| 摘要 |
PURPOSE: A transmitter output control method is provided to vary the Modulation Index which decides the transmission output level for only the corresponding channel in which the overvoltage or the excess current has generated into several steps depending on the predetermined sequential control, and to reduce the voltage or the current value of a transmission signal. CONSTITUTION: A transmitter output control method is comprised of the followings: a first step which sets the Modulation Index to an initial step(N=1); a second step which transmits the output signals which have an output level of the Modulation Index in which is set as the corresponding channel of a sensor array; a third step which monitors the voltage or current of the channels and compares the monitored voltage or current with a reference value; and a fourth step which performs the second step again after increasing the Modulation Index one step(N=N+1) for only the corresponding channel if the voltage or current, which is obtained by monitoring the output signal of the channels, exceeds the reference value, and performs the second step again after decreasing the Modulation Index one step(N=N-1) or maintaining as the initial step if the voltage or current does not exceed the reference value. [Reference numerals] (AA) Start; (BB) End; (S100) Start active transmission(modulation index step : N = 1); (S110) Monitor the voltage and current level of a transmission signal; (S120) Whether voltage and current reference values exceed or not; (S130) Reduce the voltage and current level of the transmission signal(modulation index step : N = N + 1); (S140) Whether the modulation index step finally reaches or not; (S150) Block the active transmission; (S160) Return to the voltage and current level of the transmission signal(modulation index step : If N≠1, then N = N - 1, N >= 1)
|
